Index: trunk/DataStore/lib/DataStore/Utils.pm
===================================================================
--- trunk/DataStore/lib/DataStore/Utils.pm	(revision 34365)
+++ trunk/DataStore/lib/DataStore/Utils.pm	(revision 34370)
@@ -38,5 +38,5 @@
 );
 
-$STD_FIELD = qr/^[A-z0-9-_.: ]+$/;
+$STD_FIELD = qr/^[A-z0-9-+_.: ]+$/;
 $TIME_FIELD = qr/^(\d{4})-(\d\d)-(\d\d) T (\d\d):(\d\d):(\d\d) Z$/x;
 $BYTE_FIELD = qr/^\d+$/;